Potential CLFS BLF File Tampering (CVE-2024-49138)

Ramzi Zelfani@rzelfani

•updated Nov 13, 2025•19•2•207

Detects a sequence of file operations indicative of CLFS Base Log File (.blf) tampering, a technique used in CVE-2024-49138 exploitation. The detection looks for a process writing to a .blf file, immediately followed by a read of the same file, which is an unusual pattern as regular applications use CLFS APIs, not direct file writes.